What does a light bulb and a school shooter have in common?
They both light up the room.
Light Bulb vs School Shooter
Explanation
This is a dark joke that plays on the double meaning of "light up the room." A light bulb literally lights up a room with light, while a school shooter's presence can "light up" a room with their actions. It's unexpected and shocking, which is part of what makes it a morbid joke.
:)
11 outta 10